Safety-drive for meat-cutters



.l. MILLER. SAFETY DRIVE FOR MEAT c mmas.

APPLICATION men MAYIZIIBIQ.

Patented May 4, 1920.

' 2 SHEETS-SHEET I INVENTOR.

MAN

JULIUS MILLER, OF LOS ANGELES, CALIFORNIA.

SAFETY-DRIVE FOR MEAT-CUTTERS.

Specification of Letters Patent.

Patented May 4, 1920.

Application filed May 12, 1919. Serial No.- 296,719.

To all whom it may concern:

zen of the United States, residing at Los Angeles, in the county of LosAngeles and State of California, have invented new and usefulImprovements in Safety-Dr ves for Meat-Cutters, of which the followingis a specification.

My invention relates to meat cutters and consists of the novel featuresherein shown, described and claimed.

One of the leading features of my present invention is a safety devicewhich will break when the cutter becomes clogged, and which may bereadily removed thereby avoiding the danger of breaking an expensivepart of the cutter.

Another object of my invention is to construct a meat cutter in whichthe bearings are so arranged that the lubricating oil is prevented fromcoming in contact with the meat.

Figure 1 is a side elevation of a meat cutter to which my inventionrelates, the view being taken looking in the direction indicated by thearrow 1 in Fig. 2, parts being broken away and shown in section. V

Fig. 2 is an end elevation as seen looking in the direction indicated bythe arrow 2 in Fig. 1, parts being broken away and shown in section.

Fig. 3 is an enlarged fragmentary sectional detail on a plane parallelwith Fig. 1 and on the line 3 3 of Fig. 2 and looking in the directionindicated by the arrows and showing my safety device for connecting thescrew to the operating shaft.

Fig. 1 is a perspective of the safety device.

Referring to the drawings in detail, the main casting 1 has a screwchamber 2 leading to the cutter and a hopper 3 leading to the oppositeend of the chamber 2 from the cutter, and the feed screw 4: is mountedin the chamber 2. The feed end of the chamber 2 is closed by a web 5having an opening 6 to receive the inner end of the operating shaft 7.An enlargement 8 extends from the chamber 2 to the opening 6, and. thesafety device 9 fits in the enlargement 8. The squared end 10 of theoperating shaft 7 fits in a squared opening 11 in the end of the screw4:. An enlargement 12 is formed in the end of the screw 4 outside of thesquared opening 11, preferably the enlargement 12 formed outside of theenlargement 12, thereby producing a shoulder 14; between theenlargements 13 and 12.

The safety device 9 fits in the enlargement 13 against the shoulder 14and has a flange 15 fitting against the shoulder 16 upon the end of theoperating shaft '7 around the squared end 10.

The pressure of the meat cutter against the screw 4 exerts the pressureof the shoulder 14: against the end face 17 of the safety device outsideof the plane of the periphery of the operating shaft 7, and thispressure is communicated to the operating shaft 7 by the flange 15, andthe flange 15 bears against the shoulder 16, so that when the meatcutter becomes clogged and there is unusual pressure against the screw 1the flange 15 may break and pass into the enlargement 12. Theenlargement 8 is longer than the normal length of the safety device 9thereby producing a clearance space 18,.

and when the flange 15 breaks the body of the safety device may moveinto the clearance space 18 thereby allowing the screw 4 to retreat fromthe cutter plate and pass the obstruction without breaking an expensivepart of the machine; then the screw may be removed, the safety device 9removed and a new safety device applied.

The operating shaft 7 has a central enlarged portion 19, a reducedportion 20 extending through the opening 6, a reduced portion 21extending from the other end of the enlargement 19, and a wrench seatportion 22 extending outwardly from the reduced portion 21. A ballbearing construction 23 fits around the reduced portion 20 and holds thereduced portion. 20 in a central position in the opening 6. A thrustball bearing 24; fits around the reduced portion 21. An extension casing25 extends from the main casting 1 at the opposite side of the web 5from the chamber 2, and the operating shaft 7 with the ball bearings 23and 24; are mounted in the chamber 26 of this extension casing. A plug27 in screwed into the end of the casing to back up the thrust bearing24.

The thrust bearing 24 sustains the breakin strain when the cutterbecomes clogged su ciently to break the flange 15. The periphery 28 ofthe extension casing 25 is finished to fit in the socket 29 of thesupport- 110 is circular. A second enlargement 13 is ing bracket 30, andset screws 31 and 32 are tapped through the Wall of the socket 29 intothe extension casing 25, so as to support the machine as shown in Fig.1.

An oil cup 33 is tapped into the periphery of the main casting 1 in theplane of the web 5, and the oil passage 34 leads from the oil cup to theball bearing 23 and into the chamber of the extension casing 25.

A flat Washer 35 is placed around the portion 20 against the end of theinner member of the ball bearing 23 and recessed into the outer face ofthe Web 5 to hold the oil from passing through the opening 6 to thechamber in which the meat is fed to the grinding mechanism.

Various changes may be made without departing from the spirit of myinvention as claimed.

I claim:

1. The combination with a feed screw for operating a meat cutter and anoperating shaft, the feed screw being slidingly connected to theoperating shaft of a safety device mounted upon the operating shaft andbacking up the feed screw, and having a flange adapted to be broken whenthe'cutter is clogged sufficiently to press the feed screw toward theshaft.

2. The combination with a feed screw for operating a meat cutter and anoperating

